Thanks!!!!
I’m downloading GIMP - looks easy to use.
Thanks again - very much appreciated!
One thing to know... to save a file as a JPG or PNG or GIF, you have to 'export' it from the native XCF that the Gimp saves in. Older versions let you simply save with the extensions.
Here's a GIF I made with 'The Gimp':
I was also able to delete and reorder frames (using the GIMP) to make this one from the image above: